private void Spawn(Fruit fruit)
{
// find a valid location to spawn the fruit
int fruitXPosition = _randomNumbers.Next(WINDOW_WIDTH - CELL_WIDTH);
int fruitYPosition = _randomNumbers.Next(WINDOW_HEIGHT - CELL_HEIGHT);
// set fruit's new position and reverse direction
fruit.Position = new Vector2(fruitXPosition, fruitYPosition);
fruit.Velocity = -fruit.Velocity;
}
/// <summary>
/// method to determine if the mouse is on the fruit
/// </summary>
/// <returns></returns>
private bool MouseOnFruit(Fruit fruit)
{
bool mouseClickedOnFruit = false;
// get the current state of the mouse
MouseState mouseState = Mouse.GetState();
// mouse over fruit
if ((_mouseNewState.X > fruit.Position.X) &&
(_mouseNewState.X < (fruit.Position.X + 64)) &&
(_mouseNewState.Y > fruit.Position.Y) &&
(_mouseNewState.Y < (fruit.Position.Y + 64)))
{
mouseClickedOnFruit = true;
}
return mouseClickedOnFruit;
}
protected override void Initialize()
{
// set the background's initial position
_backgroundPosition = new Rectangle(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
// create a fruit object
_fruits = new List<Fruit>();
// add fruit to the list
Fruit fruit01 = new Fruit(Content, "Fruit01", 32, new Vector2(300, 200), new Vector2(3, 4));
_fruits.Add(fruit01);
Fruit fruit02 = new Fruit(Content, "Fruit02", 32, new Vector2(100, 50), new Vector2(-1, -1));
_fruits.Add(fruit02);
Fruit fruit03 = new Fruit(Content, "Fruit03", 32, new Vector2(400, 150), new Vector2(2, 2));
_fruits.Add(fruit03);
// make the fruit active
fruit01.Active = true;
fruit02.Active = true;
fruit03.Active = true;
// make mouse visible on game
this.IsMouseVisible = true;
base.Initialize();
}
/// <summary>
/// method to determine if the mouse is on the fruit
/// </summary>
/// <returns></returns>
private bool MouseClickOnFruit(Fruit fruit)
{
bool mouseClickedOnFruit = false;
// get the current state of the mouse
_mouseNewState = Mouse.GetState();
// left mouse button was a click
if (_mouseNewState.LeftButton == ButtonState.Pressed && _mouseOldState.LeftButton == ButtonState.Released)
{
// mouse over fruit
if ((_mouseNewState.X > fruit.Position.X) &&
(_mouseNewState.X < (fruit.Position.X + 64)) &&
(_mouseNewState.Y > fruit.Position.Y) &&
(_mouseNewState.Y < (fruit.Position.Y + 64)))
{
mouseClickedOnFruit = true;
_score++;
}
}
// store the current state of the mouse as the old state
_mouseOldState = _mouseNewState;
return mouseClickedOnFruit;
}
/// <summary>
/// method to bounce fruit of walls
/// </summary>
public void BounceOffWalls(Fruit fruit)
{
// fruit is at the top or bottom of the window, change the Y direction
if ((fruit.Position.Y > WINDOW_HEIGHT - CELL_HEIGHT) || (fruit.Position.Y < 0))
{
fruit.Velocity = new Vector2(fruit.Velocity.X, -fruit.Velocity.Y);
}
// fruit is at the left or right of the window, change the X direction
else if ((fruit.Position.X > WINDOW_WIDTH - CELL_WIDTH) || (fruit.Position.X < 0))
{
fruit.Velocity = new Vector2(-fruit.Velocity.X, fruit.Velocity.Y);
}
}